Last updated: 10 September 2026 · 10 min read ·
Quick answer
Evaporative cooling uses water and outside air to cool your home cheaply in dry climates. Refrigerated air conditioning uses a sealed refrigerant loop to cool (and often heat) your home precisely in any climate, at a higher running cost. A whole-house ducted evaporative system typically costs around $3,000 to $6,000 to install; ducted refrigerated typically runs $6,000 to $12,000, or from around $600 to $3,000+ for a single-room split system depending on capacity. Evaporative generally costs cents per hour to run; refrigerated is usually 50 cents an hour or more, though both vary a lot with system size, your electricity plan and local rates.
The short version: evaporative is cheaper to buy and run but only works well in hot, dry climates and can't heat your home. Refrigerated costs more to run but works in any climate, controls exact temperatures, removes humidity, and, as reverse-cycle, can heat your home in winter too.
- Evaporative uses water and outside air; refrigerated uses a sealed refrigerant loop
- Evaporative needs windows cracked open; refrigerated needs the house sealed
- Evaporative works best hot and dry; refrigerated works in any climate, including humid
- Evaporative is cheaper to install and run, but uses water continuously
- Reverse-cycle refrigerated also heats your home; evaporative cooling-only doesn't
How each system works
Evaporative cooling
Draws hot, dry outside air through water-soaked cooling pads. As the water evaporates, it absorbs heat from the air, producing cool, moist air that's pushed into the house by a fan. Because it's constantly bringing in fresh outside air, windows or doors need to stay open slightly so the warm indoor air has somewhere to escape.
Refrigerated air conditioning (split system, ducted, reverse-cycle)
Uses a compressor and a chemical refrigerant in a closed loop to absorb heat and moisture from the air already inside your home, then expels that heat outside. The cooled, dried air is recirculated through the same sealed space. Most systems sold in Australia today are reverse-cycle, meaning the same unit can run in reverse to heat the home in winter.
Side-by-side comparison
| Factor | Evaporative cooling | Refrigerated air conditioning |
|---|---|---|
| How it cools | Water evaporation plus fresh outside air | Compressor and refrigerant, recirculated indoor air |
| Windows | Must stay open or cracked while running | Must stay closed to cool efficiently |
| Best climate | Hot, dry, low-humidity conditions | Any climate, including hot and humid |
| Humidity effect | Adds moisture to the air | Removes moisture from the air |
| Temperature control | Cools several degrees below outdoor temp, less precise | Set and hold an exact target temperature |
| Heating | Cooling only | Reverse-cycle units heat and cool |
| Upfront cost | Generally lower | Generally higher |
| Running cost | Lower power use, but uses water continuously | Higher power use, no water used |
| Maintenance | Pads need periodic replacement, water quality matters | Filter cleaning, refrigerant checks by a licensed tech |
| Air quality | Brings in outside air, including outdoor allergens and dust | Filters and recirculates indoor air |
| Typical lifespan | Around 10 to 15 years | Around 10 to 15 years, longer if well maintained |
Cost to install
Real numbers matter more here than a vague "it depends," so here's the typical Australian market range for each option. Treat these as a starting guide, not a quote, actual cost depends on your home's size, ducting or access complexity, brand and capacity.
| System | Typical install cost |
|---|---|
| Evaporative cooling, whole-house ducted | Around $3,000 to $6,000 (up to $10,000+ for larger homes or complex roof access) |
| Refrigerated, single-room split system | Around $600 to $3,000+, depending on capacity and brand |
| Refrigerated, whole-house ducted | Around $6,000 to $12,000+ |
For an exact figure for your home, get a quote based on your actual floor plan, roof access and the capacity you need. That's the only way to know whether the cheaper option on paper is actually the cheaper option for your house.
Cost to run
Evaporative systems generally cost only a few cents to tens of cents per hour to run, since they're powering a fan and a water pump rather than a compressor, plus water usage (some systems use up to around 25 litres an hour). Refrigerated systems typically run from around 50 cents an hour upward, since the compressor is doing more work, especially on the hottest days, but use no water.
Exact running costs depend on the size of the system, your electricity plan, local water rates, and how large an area you're cooling, so treat any per-hour figure as a rough guide rather than a quote. As a rule of thumb: evaporative tends to be the cheaper system to run in dry, hot conditions, while a correctly-sized, efficient reverse-cycle system can close some of that gap, particularly once you factor in that it also replaces a separate heater in winter, cutting your overall heating and cooling running costs across the year rather than just summer.
Refrigerated cooling: split system vs ducted
Both use the same refrigerated cooling technology; the difference is how it's delivered through your home.
Split system: one indoor unit (wall-mounted or floor-standing) paired with one outdoor compressor unit, cooling a single room or open-plan area. Lower upfront cost, faster to install, and a sensible option for cooling one or two key rooms rather than the whole house.
Ducted: a single central unit connected to ceiling ducts and outlets throughout the home, controlled from one thermostat (often with zoning so you only cool the rooms in use). Higher upfront cost and more involved installation, but delivers even, whole-home comfort from one system rather than several separate units.
Multiple split systems across a home can sometimes come out close to a ducted system in total cost, so it's worth pricing both ways for your specific floor plan rather than assuming one is automatically cheaper.
Is refrigerated cooling the same as reverse-cycle?
Not quite; refrigerated describes the cooling technology (a compressor and refrigerant loop), while reverse-cycle describes an extra capability: the same unit can run its refrigeration cycle in reverse to heat the home in winter, not just cool it in summer. Most refrigerated split systems and ducted systems sold in Australia today are reverse-cycle by default, but cooling-only refrigerated units still exist and are usually a little cheaper upfront if you only ever need cooling and already have a separate heater.
Which climate suits which system?
Evaporative cooling performs best where the air is hot and dry, the drier the air, the more effective the evaporation and cooling effect. In humid conditions, evaporative cooling struggles because the air is already close to saturated with moisture, so it can't absorb much more, you get airflow but not much cooling, and it can leave the air feeling clammy.
Refrigerated air conditioning isn't affected by outdoor humidity in the same way, because it's actively removing heat and moisture from a sealed indoor space rather than relying on evaporation. It performs consistently whether the day is hot and dry or hot and humid.
Humidity, air quality and allergies
Because evaporative systems constantly draw in fresh outside air, they bring pollen, dust and other outdoor allergens inside with that airflow, worth considering if hay fever or allergies are a concern in your household. They also add humidity to the indoor air rather than removing it.
Refrigerated systems recirculate and filter indoor air and reduce humidity, which can suit allergy-prone households better, provided filters are cleaned regularly. Neither system is a substitute for medical advice on managing allergies or respiratory conditions, if that's a deciding factor for your household, it's worth discussing with your GP as well as your installer.
Heating: only one of these does it
Standard evaporative cooling is cooling-only, you'll still need a separate heater (gas, wood, or electric) for winter. Most refrigerated systems sold today are reverse-cycle, meaning the same unit heats in winter and cools in summer from one appliance. For a North East Victorian winter, that dual function is often the deciding factor over evaporative cooling alone.
Rebates: Victorian Energy Upgrades
The Victorian Government's Victorian Energy Upgrades (VEU) program currently offers a discount to Victorian households and businesses installing an approved high-efficiency reverse-cycle air conditioner (heating and cooling), through an accredited provider. As at the time of writing, discounts of up to $1,610 apply for room-based systems and up to $5,530 for larger ducted systems replacing a whole-home gas heater, with the system needing a minimum 5-year warranty and, if replacing an existing unit, that unit being more than 2 years old.
This rebate currently applies to eligible reverse-cycle systems, not standard evaporative coolers. Rebate amounts and eligibility rules do change, so confirm the current offer with an accredited provider or the Victorian Energy Upgrades program before you budget around it.
Wangaratta & North East Victoria: what actually suits this climate
The North East gets genuinely hot, dry summer days, the kind of conditions evaporative cooling is built for, but winters here are cold, and many households want one system that handles both ends of the year without running two separate appliances. That's the main reason reverse-cycle refrigerated systems are so common across Wangaratta, Benalla, Myrtleford and Beechworth: one unit, heating and cooling, with no open windows needed and no water demand during the dry months when tank or town water can be tight.
Evaporative still has a place, especially for larger homes or sheds where running a big ducted refrigerated system full-time would be expensive, and where dry heat is the norm rather than humid summer nights. The right choice really comes down to your home's size, layout, budget, and whether you want cooling only or heating and cooling from one system, happy to talk through what suits your specific place.
Evaporative vs Refrigerated Cooling FAQs
Is evaporative cooling cheaper than refrigerated air conditioning?
Generally yes, both to buy and to run. Evaporative ducted systems typically cost around $3,000 to $6,000 to install versus $6,000 to $12,000+ for ducted refrigerated, and evaporative usually runs to a few tens of cents an hour versus 50 cents an hour or more for refrigerated. Evaporative does use water continuously though, and can't heat your home, so it's not automatically the cheaper option overall once you add a separate winter heater.
How much does it cost to install evaporative cooling vs refrigerated air conditioning?
As a general Australian market guide: whole-house ducted evaporative typically runs $3,000 to $6,000, a single-room refrigerated split system typically runs $600 to $3,000+ depending on capacity, and whole-house ducted refrigerated typically runs $6,000 to $12,000+. Get a quote based on your actual home for an exact figure.
How much does ducted refrigerated air conditioning cost to install?
Typically $6,000 to $12,000+ in Australia, depending on home size, ducting complexity, zoning and the system's capacity and brand. Larger or harder-to-access homes sit toward the higher end.
Is a split system the same as refrigerated air conditioning?
A split system uses refrigerated cooling technology, so it is a type of refrigerated air conditioning, just delivered through one indoor and one outdoor unit cooling a single room or area, rather than a ducted system delivering cooling through the whole home from one central unit.
What's the difference between refrigerated cooling and reverse-cycle?
Refrigerated describes the cooling technology itself. Reverse-cycle describes an added capability, the same unit can run its refrigeration cycle in reverse to heat the home as well as cool it. Most refrigerated systems sold in Australia today are reverse-cycle, but cooling-only refrigerated units still exist.
Can evaporative cooling work in a humid climate?
Not well. Evaporative cooling relies on dry air to work, the more humid the air already is, the less heat it can absorb through evaporation, so cooling performance drops significantly in humid conditions.
Does refrigerated air conditioning also heat my home?
Most refrigerated systems sold today are reverse-cycle, so yes, the same unit heats in winter and cools in summer. Evaporative cooling is cooling-only and doesn't provide heating.
Do I need to leave windows open with refrigerated air conditioning?
No, refrigerated systems need windows and doors closed to cool efficiently, since they recirculate and cool the air already inside your home rather than pulling in outside air.
Are there rebates for evaporative cooling in Victoria?
The Victorian Energy Upgrades program currently offers rebates for eligible high-efficiency reverse-cycle (refrigerated) systems, not standard evaporative coolers. Confirm current eligibility and amounts with an accredited provider, as rebate rules do change.
Which system is better for Wangaratta and the North East?
It depends on your home and priorities. Evaporative suits hot, dry conditions and lower running costs but won't heat your home or handle humidity. Reverse-cycle refrigerated systems cost more to run but heat and cool from one unit, which is why they're common across the region. Talk to us about your specific home for a straight answer either way.
Sources & further reading
- Victorian Energy Upgrades: Heating and cooling discounts
- CHOICE: Evaporative cooler vs air conditioner
- Brivis: Difference between reverse cycle and evaporative cooler
- Seeley International: Evaporative cooling systems
Not sure which system suits your home?
Tell us your home size, layout and whether you need heating as well as cooling, and we'll recommend and quote the system that actually fits, evaporative, split system, or ducted reverse-cycle.
